android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running? at android.view.ViewRootImpl.setView(ViewRootImpl.java:567) at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:246) at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69) at android.widget.MediaController.show(MediaController.java:338) at android.widget.MediaController.show(MediaController.java:298) at android.webkit.HTML5VideoFullScreen$FullScreenMediaController.show(HTML5VideoFullScreen.java:391) at android.webkit.HTML5VideoFullScreen.onPrepared(HTML5VideoFullScreen.java:225) at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:1975) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5041) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) at dalvik.system.NativeStart.main(Native Method)